docs: def verify(self):
          """
          Verify if LTI request is valid, validation
          depends on @lti wrapper arguments
  
          :raises: LTIException
          """
          log.debug('verify request=%s', self.lti_kwargs.get('request'))
          if self.lti_kwargs.get('request') == 'session':
              self._verify_session()
          elif self.lti_kwargs.get('request') == 'initial':
              self.verify_request()
          elif self.lti_kwargs.get('request') == 'any':
              self._verify_any()
          else:
              raise LTIException("Unknown request type")
          return True